Xmind - Xmind is a brainstorming and mind mapping application.
Glosbe - Huge collaborative massively multilingual dictionary.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Visuwords - The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
DocTranslator - Instantly translate and keep the formatting of any document in any language. Free!